Melatonin, also known as the 'sleep hormone', is produced by the brain's pineal gland. Melatonin is responsible for regulating our periods of both sleep and wakefulness.
After the sun sets and it becomes dark, a signal is sent to our brain to start secreting melatonin to cause sleepiness, encouraging us over time to curl up and drop into a deep and restful sleep. Exposure to artificial blue light after the sun sets disrupts this evolutionary process of 'priming' you for sleep. This harmful light suppresses the release of melatonin as it signals your brain that it is still daylight, trying to keep you awake and alert.
Melatonin plays a significant role in our overall health, one of its key roles is to counteract stimulating and energetic hormones such as cortisol in your system. When melatonin is high, cortisol will be low, this allows us to be in a low stress and relaxed state which promotes our body to obtain restful sleep and boosts cell regeneration. However if melatonin is low (due to being suppressed from blue light), cortisol will remain high - keeping you energised and stimulated at night, disturbing quality of sleep. Constant high cortisol equates to constant high stress, which will wreak havoc on the body! In this way, melatonin is necessary to maintain a regular and healthy body clock and sleep wake cycles.
Blue light is a colour in the visible light spectrum which falls within the 400-500nm range.
Blue light in the range of 400-450nm can cause eye damage such as macular degeneration. Blue and green light from 450-550nm has a direct effect on the the brain's ability to secrete melatonin, with a lack of melatonin causing issues for us in both falling and staying asleep.
Today we are surrounded by this harmful blue light from all artificial light sources. This includes computer screens, TVs, smart phones, tablets and conventional LED lighting in your home. Even though we refer to this harmful artificial light as 'blue light' does not always mean the light you notice will appear visibly blue.
For more info on blue light and its effects please read our blog post on What is Blue Light.
Most people are completely unaware that the sources of artificial blue light are everywhere; in today's modern world you simply cannot escape it. All modern devices which produce a light source will produce some amount of blue light even if it doesn't appear to actually look noticeably blue.
In fact, all artificial, electric-powered devices which produce a light source will emit blue light to varying degrees, even if it doesn't look blue.
The most common sources of artificial blue light include:
BlockBlueLight glasses have been specifically designed to block ALL the blue and green light wavelengths which are emitted from electronic devices and any artificial light sources. This includes smartphones, laptops, computer screens, LED and Plasma TVs, tablets, fluorescent lighting in offices and stores, and conventional LED lighting in homes.
This harmful blue light has been extensively researched, and has been proven to inhibit our body's ability to naturally produce melatonin, the brain's 'sleep hormone'.
When worn after the sun goes down, BlockBlueLight glasses block out ALL blue light, allowing your body to naturally wind down and prepare for sleep. This ensures you will fall asleep fast, stay sleep longer, and guarantees quality restful sleep.
BlockBlueLight glasses give you the best of both worlds: you can still use phones, devices, tablets and watch your favourite TV shows, yet your sleep and health don't need to suffer. By effectively blocking blue light from a variety of sources you allow maximum melatonin production to occur, helping you to get the best night's sleep, and wake up full of energy.
Testing by a laboratory grade spectrometer has shown that the BlockBlueLight SunDown Amber lens blocks 100% of blue light from 380-500nm and 43% of Green light from 500-550nm.
The Nocturnal Ultra Red lens blocks 100% of blue light from 380-500nm, and 100% of green light from 500-570nm
Research shows that blue light between 400 and 450nm causes macular degeneration, retina damage, and can also be responsible for causing migraines and headaches through eye strain. Blue and green light between 450 and 550nm will have a very strong effect on suppressing the production of melatonin which in turn causes sleep issues.
There are many blue light blocking glasses available on the market making all sorts of different claims. We know that this can make purchasing a quality pair overwhelming and very confusing!
A lot of the orange or red-tinted glasses being sold are just simply that, red and orange-tinted. Often suppliers have not properly designed the lens to ensure it is actually blocking the correct wavelengths of blue light, with no research or testing in these products' development. If this is the case, you aren't likely to notice any significant changes or benefits from these types of lenses.
Many other brands of glasses are being sold that have clear lenses yet are still claiming to block various sources of blue light. Typically, these lenses are really only filtering out very small amounts of harmful light. Clear lens glasses will only really be capable of filtering around 10% - 20% of blue light - slightly beneficial for eye strain but they will not have any benefits in preserving melatonin and improving quality of sleep.
All of BlockBlueLight's glasses have been extensively researched, scientifically designed and manufactured specifically using the best technology to ensure ALL of the wavelengths of harmful blue and green light are both being removed.
We have our lenses tested by a laboratory grade spectrometer to ensure we are producing the very best lenses which effectively block all blue light. You can see our lens testing reports here. We are confident that you won't find better quality blue light blocking glasses on the market.
We have designed our glasses to have a wrap-around fit to ensure there is no light leakage coming in from the sides and still entering the eye - this is critical to ensure the glasses remain effective at blocking out all artificial light. Many glasses are simply focused on fashion and style of their frames but not focused on blocking harmful artificial light to promote improved sleep. Don't be fooled by expensive blue blocker glasses that may look good, as they are most likely doing a very poor job at both blocking the correct wavelengths of blue light, and keeping the harmful blue light from still entering your eyes through the sides!
Yes, we have created our fit-over range of glasses which have been specifically designed for this reason. You can continue to wear your existing reading or prescription glasses, and our fit-over glasses will nicely fit over them and provide maximum protection against blue light. We offer these in both the Nocturnal Red Ultra Lens, and the Original Dark Amber lens.
SunDown Amber lenses block 100% of blue light and green light up to 530nm, which means that your brain will be producing melatonin a few minutes after you start wearing them, remembering that more melatonin equals better sleep quality. These blue-blocking glasses are perfect if you watch television or look at a computer screen during the evening. If you have your lights on at night, we also recommend wearing these glasses. These are available in both original, fit-over, and stylish models.
Nocturnal Red lenses block all light wavelengths of blue and green up to 570nm. These are the wavelengths shown to most affect our internal clock, lower melatonin levels alter our sleep/wake cycle. They not only block blue light but also all green light. Why block green light as well? Research now shows the green light emitted by modern electronic devices and light bulbs is also contributing to suppressing melatonin levels at night. Our orange-tinted glasses dramatically improve your melatonin production levels, the red lenses simply increase this even further. We have these available in our premium nightfall frames and fitover nightfall models.
ScreenTime Premium Day glasses are for people who spend most of their day indoors under artificial light. If you're spending all day in front of a computer or projector screen, then ScreenTime Premium Day glasses are perfect for you. The benefits of these glasses are that they filter out 50% of all blue light coming from LED and fluorescent light bulbs, smartphones, computer screens, and projector screens.
Daytime glasses, for example, make you much less tired when looking at a computer screen all day. When wearing these glasses they eliminate headaches, eye strain and migraines.
BlockBlueLight bulbs are specifically designed and manufactured to block the blue light wavelengths that will interfere with melatonin being released. Our bulbs are guaranteed to block wavelengths up to 510nm. Several top lighting manufacturers have introduced nighttime bulbs that have lower blue light output and label these are "warm white", however these bulbs have been designed with removing enough of the blue light spectrum, they still emit high amounts of blue light to still cause melatonin suppression. Only BlockBlueLight bulbs are guaranteed to be 100% blue-free.
Don't be fooled: many of the more expensive products on the market are simply overpriced and nowhere near as effective. A higher price does not equal a better product!
We have found there are now many companies offering glasses which are very focused on providing trendy and fashionable frames. The issue with these is they allow light to enter the eyes from the sides of the glasses which renders the glasses ineffective; you may look good but you're still not blocking the harmful light from entering your eyes. The other issue is being fashionable and trendy comes at a much higher price, but its does not actually do a better job! We design our glasses to wrap around the face so there is no light leakage, meaning no harmful blue light enters the eyes at all. This makes them both the best value and most effective glasses on the market.
Don't waste your money on trying to look good as it's not going to improve your sleep! Make sure you have a good wrap around fit with a lens designed to block thee full spectrum of harmful light.
BlockBlueLight is the worldwide leader in blue light blocking products. Our lighting products and glasses are scientifically designed, manufactured to the highest standards, and laboratory tested to ensure they eliminate the full spectrum of blue light wavelengths that suppress melatonin production.
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